Molded from the finest corded rubber on the market, nothing matches the pliability and strength of DuraFlex rubber. Crush-proof, crack-proof, and freeze-proof so you can use it indoors or outdoors year-round. A great feeding pan that holds up to rugged use and abuse. For outdoor use, works great to supply your own 15-inch spare tire to anchor the pan (optional, not included). Rubber is naturally safe and soft for animals. Perfect for horses, sheep, goats, alpacas, llamas, and other livestock.